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76 lines
1.8 KiB
Go
76 lines
1.8 KiB
Go
package objecttree
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import (
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"errors"
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"github.com/anyproto/any-sync/commonspace/object/tree/treechangeproto"
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"github.com/anyproto/any-sync/util/crypto"
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"github.com/gogo/protobuf/proto"
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)
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var (
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ErrIncorrectSignature = errors.New("change has incorrect signature")
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ErrIncorrectCid = errors.New("change has incorrect CID")
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)
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// Change is an abstract type for all types of changes
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type Change struct {
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Next []*Change
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PreviousIds []string
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AclHeadId string
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Id string
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SnapshotId string
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Timestamp int64
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ReadKeyId string
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Identity crypto.PubKey
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Data []byte
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Model interface{}
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Signature []byte
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DataType string
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IsSnapshot bool
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IsDerived bool
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// iterator helpers
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visited bool
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branchesFinished bool
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}
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func NewChange(id string, identity crypto.PubKey, ch *treechangeproto.TreeChange, signature []byte) *Change {
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return &Change{
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Next: nil,
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PreviousIds: ch.TreeHeadIds,
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AclHeadId: ch.AclHeadId,
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Timestamp: ch.Timestamp,
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ReadKeyId: ch.ReadKeyId,
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Id: id,
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Data: ch.ChangesData,
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SnapshotId: ch.SnapshotBaseId,
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IsSnapshot: ch.IsSnapshot,
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Identity: identity,
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Signature: signature,
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DataType: ch.DataType,
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}
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}
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func NewChangeFromRoot(id string, identity crypto.PubKey, ch *treechangeproto.RootChange, signature []byte, isDerived bool) *Change {
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changeInfo := &treechangeproto.TreeChangeInfo{
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ChangeType: ch.ChangeType,
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ChangePayload: ch.ChangePayload,
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}
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data, _ := proto.Marshal(changeInfo)
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return &Change{
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Next: nil,
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AclHeadId: ch.AclHeadId,
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Id: id,
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IsSnapshot: true,
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Timestamp: ch.Timestamp,
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Identity: identity,
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Signature: signature,
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Data: data,
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Model: changeInfo,
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IsDerived: isDerived,
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}
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}
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func (ch *Change) Cid() string {
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return ch.Id
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}
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